Hi All,
I'm new here, but if I might add to this. I have the same MF135 with this seat. I live in Ontario, Canada. I have known my 1968 MF135 gas since I was 4 years old. It has never had a shock absorber under the seat at all. I found this topic because I am in need of a new seat portion, my spring assembly is in working order still.
Any ideas where to locate one?